<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{% block title %}{% endblock %}</title>
</head>
<body>
<div class="container">
    <div class="header">这是头部</div>
    <div class="main">
        {% block content %}{% endblock %}
    </div>
    <div class="footer">
        <a href="http://linux.tedu.cn">达内云计算学院</a>
    </div>
</div>
</body>
</html>